HVAC Certification Requirements in Indiana No state license required to become HVAC technicians in Indiana. Note: Federal law requires EPA certification. Tagged on: certification requirements, Indiana By Janice Kirkwood | September 2, 2013 | HVAC Certification Requirements | No Comments | ← HVAC Certification Requirements in Iowa HVAC Certification Requirements in Idaho → Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment. Current [email protected] * Leave this field empty